| 摘要 |
PROBLEM TO BE SOLVED: To provide a receiving device which, when checking the presence of a digital broadcast, stabilizes the reception of an analog broadcast while also making a digital broadcast easy to receive, and which can be implemented in a small circuit scale.SOLUTION: In a receiving device 100, a simultaneous broadcast of digital and analog waves is received. The receiving device 100 comprises: a RFAGC unit 3 which attenuates an input wave; a microcomputer unit 15 which controls the gain of the RFAGC unit 3; a storage unit 18 which stores therein a control voltage with which the microcomputer unit 15 is controlled; an analog use narrowband IF filter unit 7; a digital use wideband IF filter unit 8; a digital radio demodulator unit 13; and an analog radio demodulator unit 12. When an analog signal is being output, the microcomputer unit 15 periodically switches the analog use narrowband IF filter unit 7 to the digital use wideband IF filter unit 8, and at the same time reads out from the storage unit 18 a set control voltage which was preset for use at switching time. |
